VPS Super Concentrated Fuel Injector Cleaner contains synthetic cleaners to remove deposits from intake valves, fuel injectors, ports and carburetors. Power and performance can be reduced if deposits are allowed to accumulate in these vital areas. VPS Super Concentrated Fuel Injector Cleaner removes power robbing deposits to help your engine run as it was designed to run. It smoothes out rough idle, improves acceleration and reduces harmful emissions. Safe for catalytic converters and oxygen sensors. Contains no alcohol. One 10 ounce bottle treats up to 20 gallons of gasoline. Can be used with all gasoline and gasohol. Valvoline Professional Series Top Treat Oil System Cleaner has proven cleaning performance, designed to dissolve and remove sludge from engines. Infrequent oil changes combined with stop-andgo driving can cause sludge formation which leads to problems such as reduced oil circulation, restricted oil passages, reduced heat transfer, sticky valves, lifters and piston rings. VPS Top Treat Oil System Cleaner does not contain any seal harming solvents and is easy to dispose of where regular engine oil is disposed. Always follow label directions.